Device for converting energy



c; F. GouDY ETAL 1,831,787

DEVICE FOR CONVERTING ENERGY Nov. 10, 1931.'

Filed April 9, 1930 INVENTORS Patented Nov. 10, 1931 :UNITED STATES PATENT o ricE CARL F. GOUDY, F FLUsHI e, AND OLIVER, B. PARKER, or BROOKLYN, NEW YORK, AS-

SIGNORS T0 PACENT ELECTRIC COMPANY, ma on NEW YORK, N. Y., A CORPORATION OF NEW YORK DEVICE FOR CONVERTING ENERGY Application filed April 9, 1930. Serial No. 442,973.

impulses or vice versa and special objects of the invention are to provide a device of this nature, which will be simple and effective and which may bereadily manufactured at relatively low cost. 7

'Vario'usvother objects and the novel vfeatures of the invention by which the attainment of such objects is effected will all appear as the specification proceeds. I

The drawings accompanying and forming part of this specification illustrates one simple commercial embodiment ofthe invention, but as this illustration is primarily for-pun poses of disclosure, it will be understood that the structure may be modified and changed without departurefrom the true spirit and broad scope of the invention. I

Fig. 1 is a broken part sectional view of a form of the invention embodied as a pickup for electric phonographs; Fig. 2 is a cross-sectional view as taken on substantially the plane of line 2-2 otFig. 1; Fig. 3 is a broken elevation of the device and Fig. 4 is an enlarged sectional detail of the same. A constant magnetic field is providedin the disclosure by a permanent U-magnet 5. This magnet is equipped with special pole pieces, one of them 6, of generalC-shape with a gap 7 and the other 8 of U-form and disposed centrally within the C-shaped pole, substantially at right, angles thereto; These pole pieces 6 and Sam carried by fiat bars or back pieces 9, .10. secured fiat to one face of the magnet bythe through bolts 11, 12. Mounted for cooperation with the double pole piece 8 is an armature 13 disposedwith its longitudinal axis substantially parallel with and intermediate the tips of this pole piece and this armature is shown as having a downwardly inclinedneedle holder-lto receive the needle 15 and provided with a suitable needle clamping screw 16. v

Windings 17, are shown engaged on the two legs or sides ofthe U-sha'ped pole piece, said windings having suitable terminals 18 for connection of external circuit conductors.

.The armature is movably supported in the I 60 presentdisclosure bybeing securedonthe outer face ot a flexible diaphragm 19.- The] T action of this diaphragmand hence of the armature is damped? andcontrolled in the presentdisclosure by. a body of oil or other suitable damping liquid or fluid20 confined in a cup or. case 21, mounted between the sides of the U-inagnet and encompassing the pole pieces and the coils. In the present illustrattion, the mounting of this case is'eiiected by having the bases 9,10, of the pole pieces extending through opposite sides ofthe case and suitably secured thereto as by brazing or soldering, so thattheprojecting portions serve in effectas attaching or' mounting bracket-son theoutside ofthe case.

The flexible diaphragm which mounts the armature is utilized as an end closuretor the case, itgbeing shown as 'removably secured thereto by the screw ring 22, the joint being made liquid tight by a suitable gasket 23. .c

The structure described may be encased between cheek plates 24, shaped, and flanged to fit about the magnet, pole pieces and coil case,

as indicated in Figs.v 1 and 3, these cheek plates being shown as secured in place by the through bolts 11, 12 and by an extra clamp bolt 25 passed through the arch of the magnet, These same cheek plates are utilized in the present illustrationto, mount the unit on the end'oii' the phonograph arm, the latter being indicated at 2 6 as clamped between the neckextensions 27, at one side of the cheek plates by a. clamp screw 28 1 I The particular unit shown is designed for operation with the lateral cut type of phono graph record, the armature and stylus holder being therefore positioned, so that lateral variations in the groove will rock the arinature to vary the flux threading the coils and thereby setup variations inthe coil circuit corresponding in sense to i the mechanicalmovements of the stylus. The liquid bearing against the backof the diaphragm exerts a damping and controlling effectholdingthe; armature within the proper limits of action and preventing distortion effects. The liquid ,is ofa nature to protect the coils and internal connections of the unit. The case, pole pieces and wmdlngs may be made up in final'shape 1 before being attached to the magnet and the in the case may be readily renewed, replaced,

' reduced or increased upon simply unscrewing he end ring which holds the diaphragm in place. This mounting also permits the diajphragm to be rotated one way or the other,

to vary the position of the armature and stylus holder. In this connection, also it will be noted that the U-shapedpole piece is adjustably secured to its supporting bar 10 by a screw extending through the back of the U-piece, so that this double pole piece and the windings carried thereby may be set at different angles in assembling or adjusting the device. The diaphragm damping and coil containing case occupies a position transversely between the sides of the U-magnet, sees not to add too much to the bulk of the device, and it is well braced at both faces of the magnet, so. as not to shake loose or vibrate. I

Figs. 3, and l illustrate a special form of diaphragmwhich is corrugated at 31' to provide the hinging axis indicated'by the broken line 32 to facilitate flexureof the diaphragm along such axis. The diaphragm may be provided with additional corrugations at 33 at opposite sides of and parallel with the hinging corrugation at 31. In this Way, flexure of the diaphragm on the proper axis is obtained withoutushig the armature 13a as a stiffening member;

The stylus holder extends substantially at aright angle to or transversely of; the axis of flexure defined by the diametrically extending portion of diflferent cross-section and the other portion or portions of different cross-section parallel to the axis and at one or both sides of the same aid in the flexure of the diaphragm along this definite axis.

What is claimed is:

1. A device for conversion of mechanical and electrical impulses, comprising a U-magnet, a case secured transversely between-the sides within the arch of said magnet, pole pieces for said magnet located within said case, a winding associated with one of; said pole pieces, a flexible diaphragm at one end of said case and an armature member carried by said flexible diaphragm in cooperative relation to one of the pole pieces.

2. In a device of the'character disclosed,

a U magnetprovided with pole pieces, a case containing a damping liquid located within the arch of the U-magnet and enclosing said pole pieces, a flexible diaphragm sealing one end of the case and a member supported by c net," a relativelymovable member for cooperatire reaction with said pole pieces, a mount for said memberand clamp means for scouring saidmount, pole pieces, magnet and support all in assembled relation including cheek plates engaged with opposite faces of the pole pieces, magnet and support.

5. In combination with a support, a U.- magnet, pole pieces for the arms ofsaid magnet, a relativelyimovable member for cooperative reaction with said pole pieces, a mount tor said-member and clamp meansfor securing said mount, pole pieces,..magnet and support all in assembled relation includingcheek plates engaged with opposite-faces of the pole pieces, magnet'andsupport, said mount including a casesurrounded at least in .part

' bythe magnet, the cheek plates being recessed to accommodate said case;

6, A device of the charaeten disclosed, comprising a U-magnet, a. case. for containing a damping fluid, pole pieces. connected-[with said case and having base portions projecting out ot the case and by which said pole pie'c-esand case are secured to the-magnet, a flexible diaphragm closing one. end oi the case and a vibrating member carried by the diaphragm in-cooperative relation to the pole. pieces.

' 7 In apparatusof the character disclosed, a diaphragm having a. substantiallydiametricall-y extending:- corrugation defining a substantially diametrically extending axis of flexure and a stylus holden connected with said' diaphragmtransversely of said axis of flexure. '7 I I 8. In apparatus oi: the. character disclosed,

a. diaphragm having a substantially diametri-cally extending corrugation defining a substantially diametricallyl extending axis of flexure and a stylus holder connection with said diaphragm transversely oi? said. axisof flexure, said diaphragm having an additional corrugation therein substantially parallel to andalongsidesaid first corrugation.

9; In a device of the character. disclosed, a diaphragm having tormedthe-rein a substantially diametrically extending portion of difi'erent cross-section from other portions of the diaphragm and defining a substantially diametrically extending axis of flexure and a stylus holder connection with said diaphragm and disposed at an angle to said axis of flexnre.

10. In a device of the character disclosed, a diaphragm having formed therein a substantially diametrically extending portion of different cross-section from other portions of the diaphragm and defining a substantially diametrically extending axis of flexure and a stylus holder Connection with said diaphragm and disposed at an angle to said axis of flexure, said diaphragm having another portion of different cross-section alongside said first portion aidin flexure of the diaphragm along the axis a oresaid.

In testimony whereof we aflix our signatures.

CARL F. GOUDY. OLIVER B. PARKER. 

